Journal
MICROBIAL ECOLOGY
Volume 72, Issue 4, Pages 831-839Publisher
SPRINGER
DOI: 10.1007/s00248-015-0660-1
Keywords
Borrelia turdi; Multilocus sequence typing; Isolate; Portugal; Ixodes frontalis; Phylogenetic analysis
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Funding
- Portuguese Foundation for Science and Technology [SFRH/BPD/62898/2009]
- FCT/ MCTES/PIDDAC, Portugal [UID/MULTI/04046/2013]
- Fundação para a Ciência e a Tecnologia [SFRH/BPD/62898/2009] Funding Source: FCT
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Borrelia turdi is a spirochete from the Borrelia burgdorferi complex, first reported in Japan, that has been increasingly detected in Europe. This genospecies is mostly associated with avian hosts and their ornithophilic ticks such as Ixodes frontalis. In this study, we isolated B. turdi from five I. frontalis feeding on Turdus merula, Turdus philomelos, Parus major and Troglodytes troglodytes, and one Ixodes ricinus feeding on a T. merula in Portugal. These isolates were genetically characterised according to their 5S-23S rRNA intergenic spacer, 16S rRNA and through typing of seven housekeeping genes (multilocus sequence typing). Multilocus sequence analyses revealed that the strains isolated in our study, although belonging to B. turdi genospecies, are not identical to the B. turdi reference strain Ya501. Instead, our strains are separated into a clear defined group, suggesting that the European samples diverged genetically from the strain originally detected in Japan. Population analysis of 5S-23S rRNA sequences can further resolve subpopulations within B. turdi, but more samples from a large geographical scale and host range would be needed to assess potential phylogeographical patterns within this genospecies.
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